mods: add OS-independent game viewport composition

src/core/TouchControls.lua

@@ -339,7 +339,7 @@ end
 -- demand.  Mirrors it into self.orientation / self.positions / self.scale,
 -- which layout(), the editor chrome and the tests read.
 function TouchControls:currentBucket()
-  local _, _, sw, sh = SafeArea.rect()
+  local _, _, sw, sh = SafeArea.windowRect()
   local o = orientationFor(sw, sh)
   self.layouts = self.layouts or { portrait = {}, landscape = {} }
   local b = self.layouts[o]
@@ -363,7 +363,7 @@ end
 -- while sizes stay derived from the short edge, times the orientation's
 -- size setting (#633).
 function TouchControls:layout()
-  local ox, oy, sw, sh = SafeArea.rect()
+  local ox, oy, sw, sh = SafeArea.windowRect()
   if self.layoutW == sw and self.layoutH == sh
      and self.layoutOx == ox and self.layoutOy == oy and self.L then
     return self.L
@@ -397,7 +397,7 @@ end
 -- Move one control to a screen-space point and persist its normalized
 -- position within the safe rect.  Used by the layout editor while dragging.
 function TouchControls:setControlCenter(name, cx, cy)
-  local ox, oy, sw, sh = SafeArea.rect()
+  local ox, oy, sw, sh = SafeArea.windowRect()
   local L = self:layout()
   local zone = L[name]
   if not zone then return end
@@ -608,10 +608,10 @@ local function drawIcon(img, zone, pressed, alphaMul)
                      zone.cy - img:getHeight() * scale / 2, 0, scale, scale)
 end
 
--- Screen-space, called by Game:draw after Renderer:endFrame -- and by
--- Game2:drawHud after Gold's own present pass -- so the overlay rides on top
--- of everything (world, UI, CRT/GBC FX included).  Also used by the launcher
--- layout editor under preview mode.
+-- OS-window space, called after GameViewport.finish so the overlay rides on
+-- top of the game, companion composition and post-processing without being
+-- captured or scaled with any game viewport. Also used by the launcher layout
+-- editor under preview mode.
 function TouchControls:draw()
   if not self:visible() then return end
   local L = self:layout()